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Letters Patent No. 80,744, elated August 4, 1868.

' IMPROVEMENT IN SOCKET FOR TOOL-HANDLES.

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` day of March, '1868.

VBe it known that I, WILLIAM H JOHNSON, of the city and county of Philadelphia., and State of Pennsylvania, have invented a new and useful Improvement in Paper-Hangers Scrapers, and other Tools; and I do hereby declare that the following is a full and exact description thereof, reference being had tothe accompanying drawings, and'to'the letters of reference marked thereon. v

Thenatnrc ofmy invention consists of a cast screw-socket for the reception of the handles of paperf hangers scrapers, and other tools, the said socket having wide-openspaees between the bases of the threads except at the connection of tie-ribs with the latter, which are at suitable distances apart to give the requisite sti'ness and stability to'the threads.

In the accompanying drawings- 4 `Figure 1 is a side view of the improved socket, with a paper-hangers scraper in connection therewith.

Figure 2 is a longitudinal section at the line :l: z of iig. 1. l

Figure 3 is a top' view of a halt` pattern and flask for making a plaster-of-Paris pattern to use in moulding a cast-iron core-box, for forming the core for the screw-socket B.

Figure 4 is an end view f 'a cast-iron socket containing the core.

Figure 5 is an end view of a cast-ironrpattern for mouldingthe socket.

Like letters in all thel figures indicate the same parts.

A is a paper-hangers scraper. B is a. screw-socket for conning the handle thereto, it having a knife-edge or V-shaped screw, a, in its interior, into which a wooden handle is screwed, the knife-edge thread cutting the screw on the periphery of the handle, as the latter is turned around and pushed into the socket. I construct the socket B with wide-open spaces, Z1, between the threads a, except at the connection of the longitudinal ribs u with the bases of thethreads, and at therannular ring-s d, which constitute the ends of the socket. The said ribs are placed at suitable distances apart to give the requisite stiffness to the threads of -the screw.

The object of forming an' open screw-socket is to decrease its weight,`so as to reduce the cost of the article,

as well as making it more convenient for the workmen.

Imaker the jaw G separate from the jaw C', and confine the blade A between the two, by means of the screw D. The socket I form on a sand or composition-core, which forms the threads a of the screwvand the open spaces b .between the threads.

My plan is asfollows: 4

I turn a pattern the full diameter of the socket, and cut a thread in the periphery of thesame, in a screwcutting lathe. I thon obtain plaster-of-Paris impressions therefrom, one for each half of a core-box, to produce a east-'iron core-box fo1""form ing a c ore on which the screw-socket is east.

Fig. 3 represents one-half of a eore-pattern, E, made as above described, in a. flask, F, for taking one-half plaster-of-Paris pattern for making a cast-iron core-box, Gr, as seen in fig. 4, the other half being made in the same manner. The core H in the box G being on'the periphery, and, at the bases ofthe threads a', of the same diameter as the cylindrical part` of the pattern 4T, seen in fig. 5, the threads of the core, cut through the mould formed by m'eans of the said pattern, making open spaces b between the threads a of the screw-socket B, as represented in figs. 1 and 2.l i

I have represented in the drawings the screw-socket B as one mode of attaching handles to paper-hangers scraper, yet I contemplate using it in tools of other description, which have round removable handles.

What I claim asrnyinvention, and desire to,secure by Letters Patent, is-

A east screw-socket, B, for tool-handles, when the screw-threads@ have open spaces b between them, formed by moans of a sand or composition-core, I-I, substantially as and for the purposes herein set forth.

In testimony that the above is my invention, I have hereunto setmy hand and ailxed'my seal, this seventh Witnesses:

STEPHEN Usricu, JonN WHITE.

WM. H. JOHNSON. [ne] 

